Skip to main content
. Author manuscript; available in PMC: 2016 Jul 1.
Published in final edited form as: Public Opin Q. 2015 Summer;79(2):420–442. doi: 10.1093/poq/nfv012

Table 3.

Item-Level Nonresponse Rates by Data-Collection Mode and Case Flow

Data-collection mode Case flow
p-value
Phone-first Mail-first
CATI
 N 657 370
 Education 0.4 0.6 0.3723
 Age 0.8 0.3 0.0693
 Income 7.8 7.3 0.5663
 Diabetes 2.5 3.3 0.4753
 BMI 2.5 6.0 0.0112
 Fruit servings per day 0.2 0.3 0.7071
SAQ
 N 609 1,183
 Education 1.3 1.0 0.2011
 Age 0.8 2.4 < 0.0001
 Income 7.3 8.2 0.1907
 Diabetes 6.9 8.8 0.1534
 BMI 3.5 3.2 0.7861
 Fruit servings per day 5.3 7.3 0.0893
Combined
 N 1,266 1,537
 Education 0.9 0.9 0.9054
 Age 0.8 1.9 0.0103
 Income 7.6 8.0 0.6689
 Diabetes 4.6 7.5 0.0010
 BMI 2.9 3.9 0.1548
 Fruit servings per day 2.6 5.6 < 0.0001